Best thread sealant?

[Doofy]

Been using Permatex "Aviation" Form-a-Gasket sealant for decades.

 

[Deere Dude]

I will generally use Teflon paste and seals most joints. If I feel like taking it apart again because of leaks or plugged valves I use Teflon tape. If I want it to stay sealed I generally use Locktite 242 for air, water, grease, paint etc. Hydraulics use another Locktite number others mentioned.,

 

[SilentJ]

I take this comment as referring to NPT threads assembled with no leak preventive measures? If so, I tend to agree. I always use some type of sealant.

NPT threads seal by deforming the threads. Flank to root metal. As mentioned, sealant is less effective then lubricant as lubricant allows the correct pressure between threads to be established without needing the 8 foot pipe on the wrench.

Per the other naysayers who are in love with this thread sealing system that wasn稚 ever really intended for hydraulics, the water in your house that痴 uses NPT pipe isn稚 3,000 PSI.

The other problem is the threads are tapered and I can稚 tell you how many cracked valve, motor, and pump housings I致e seen from over torqued NPT tapered threads basically splitting (wedging) them out

Look, I know it痴 everywhere and it痴 cheap and there痴 no reason to fix anything that痴 not broke.

Very few hydraulic component manufacturers even make NPT ported components , and those that do are only intended for aftermarket.

 

[RoyKing]

Permatex fan aviation and number1 harding in a tube

 

[300UGUY]

Loctite is what we have always used.

 

[SilentJ]

NPT threads seal by deforming the threads. Flank to root metal. As mentioned, sealant is less effective then lubricant as lubricant allows the correct pressure between threads to be established without needing the 8 foot pipe on the wrench.

Per the other naysayers who are in love with this thread sealing system that wasn稚 ever really intended for hydraulics, the water in your house that痴 uses NPT pipe isn稚 3,000 PSI.

The other problem is the threads are tapered and I can稚 tell you how many cracked valve, motor, and pump housings I致e seen from over torqued NPT tapered threads basically splitting (wedging) them out

Look, I know it痴 everywhere and it痴 cheap and there痴 no reason to fix anything that痴 not broke.

Very few hydraulic component manufacturers even make NPT ported components , and those that do are only intended for aftermarket.

Why do all my posts change every punctuation mark into gibberish ?

 

[flashpuppy]

Find the stuff called Grrip. It's black and super sticky. It will stain your hands if you get it on them and is about impossible to get off. This stuff works well and is the only thing I use on hydraulics/pneumatics/water.

Hercules-Grrip- | Oatey

 

[flashpuppy]

Why do all my posts change every punctuation mark into gibberish ?

I feel your pain friend. It is the apostrophe that is causing your gripe. Have not found a solution on mobile yet.

https://www.tractorbynet.com/forums/news-feedback/406225-what-deal-apostrophes-mobile.html

 

[pmsmechanic]

So I guess I'm a minority here. I've always used Teflon tape on hydraulic pipe thread joints. I've rarely had problems with leaks and I've never had issues with the stuff in valves etc. We were taught, when I took my heavy duty ticket that you use 2.5 turns of the tape on a joint and you do not put any tape over the end of the threads. Also you do not install the tape against the direction of the threads. You always install the tape so that tightening the threads tightens the tape. A bit of care in installation prevents problems!

 

[PILOON]

Once being in a bind I used a urethane caulking as a sealant.
It worked so well for me that it is my standard 'go to' product now.
Best yet is a large tube is affordable in the $5.00 or so range and I always seem to have a few tubes around.
It is very similar to windshield adhesive with same characteristics only less costly.

Also have noticed that 'offshore' pneumatic fittings generally are using epoxies to seal their fittings.

PS, I don't much like Teflon tape as I have split more things than I like.

 

[davidgreams]

I prefer to use stainless fittings everywhere and deform the threads until they gall. Very serviceable. Seals Great.

 

[ovrszd]

So I guess I'm a minority here. I've always used Teflon tape on hydraulic pipe thread joints. I've rarely had problems with leaks and I've never had issues with the stuff in valves etc. We were taught, when I took my heavy duty ticket that you use 2.5 turns of the tape on a joint and you do not put any tape over the end of the threads. Also you do not install the tape against the direction of the threads. You always install the tape so that tightening the threads tightens the tape. A bit of care in installation prevents problems!

Yep, I agree with all of this.

 

[WranglerX]

Why do all my posts change every punctuation mark into gibberish ?

What text encoding is you browser/app using.... "Western", "Unicode" ??? ....

Generally only have this trouble with ***some *** incoming emails....

Dale

 

[garthr]

I hvve a loader with the oldest hose from 1985. I removed that hose because the UV rays killed the hose. Not because the pipe threads leaked.

With that logic every house in american would also have water leaks.

that is logical. thats why i have a full time job.

 

[garthr]

I have a product made by Permatex. Looks like a tube of tooth paste - light grey in color. Specifically made for use with piping carrying petroleum products. Smear it on all the thread except the first two or three. Been using it for 12+ years now. Seals just fine.

this is the most effective npt pipe sealant i know of. i have used in conjunction with t tape on many jobs over the yrs. usually specd on diesel fuel station piping. kind of expensive though.

 

[Fallon]

What text encoding is you browser/app using.... "Western", "Unicode" ??? ....

Generally only have this trouble with ***some *** incoming emails....

Dale

Many word processors use funky characters when you dont expect them to. Like a unique opening (left handed) double quote & a different closing double quote (right handed). Your keyboard only has a single generic double quote. Word processors generously change this for you behind your back. When you copy & paste or hit post, the software running the web forum has to convert those funky characters back to something standard. Resulting in weird character strings. It's pretty common converting between various forms of text these days, especially posting to websites.